Motorcycle main frame



FIG. 1 is a left side elevation view of the motorcycle main frame of theinvention, showing my new design.

FIG. 2 is a right side elevation view of the motorcycle main frame ofthe invention.

FIG. 3 is a front elevation view of the motorcycle main frame of theinvention.

FIG. 4 is a rear elevation view of the motorcycle main frame of theinvention.

FIG. 5 is a top plan view of the motorcycle main frame of the invention;and,

FIG. 6 is a bottom plan view of the motorcycle main frame of theinvention.

I claim the ornamental design for a motorcycle main frame, as shown anddescribed.